Transferring service.

Hi.  Currently, I have xfinity service in my home, and I have my own modem.  I am moving to an apartment.  The apartment has xfinity for internet.  Will my modem automatically work when I plug it in, or do I have to register something in my new location?  I have not moved yet nor have I spoken with the apartment staff about how they do it.  Maybe you have some questions for me that I can ask about with the staff.  Maybe that is not how apartments work.  Thank you.